Reply To: Drone zero lift help

[Rob]

Again, with mrf (reference) frame the mesh doesn't move so can't become twisted. That would typically have an interior zone between it and the outer domain. So not sure what's happened. With mrf if you're not quite there with the vector it'll just give some slightly odd rotation effects in the velocity field. 

I'd expect some value of lift/drag regardless as it's near impossible to not see a number. If you report the value from the panel rather than plotting is it still precisely zero? If you put a contour through the rotor plane (vertical) how does the velocity field look?